Articulated locomotive



May 2 1 950 A. l.. LEE 2,506,460

I ARTICULATED LOCOMOTIVE 5 Sheets-Sheet l INVENTOR; ARTHUR LEE,

/M ,Wam-

HTT'Y May 2, 1950 A, LEE

` ARTICULATED LocoMoTIvE Filed Sept. 4, 1945 INVENTOR; AQTHUIQ l LEE,

HTT'Y May 2, 1950 A. L. LEE 2,506,460

ARTICULATED LOCOMOTIVE Filed Sept. 4, 1945 3 Sheets-Sheet 5 INVENTOR; AQTHUIQ L.. LEE,

HTTY

Patented May 2, 1950 ARTICULATED LoooMo'rIvE Arthur L. Lee, Upper Arlington, Ohio, assigner,

by mesne assignments, to The Jeffrey Manufacturing Company, a corporation of Ohio Application September 4, 1945, Serial No. 614,117

17 Claims.

This invention relates to an electric locomotive, particularly of the type adapted for use in coal' and other mines.

An object of the invention is to provide a large, heavy locomotive of this type, preferably having eight driving wheels; the locomotive being constructed with low overall height and With ability to turn on relatively sharp curves.

Another object of the invention is to provide a locomotive or a locomotive frame involving a pair of trucks or power driven frames connected in tandem, each preferably provided with four motor driven traction Wheels, the trucks or frames being interconnected by an intermediate frame body or section which is supported entirely by the end trucks and which preferably provides a carriage for controllers and the like for the locomotive.

Other objects of the invention will appear hereinafter, the novel features and combinations'being set forth in the appended claims.

In the accompanying drawings,

Fig. l is a perspective view of a locomotive incorporating the features of my invention shown in operation on a curved track in a coal mine Fig. 2 is a plan view, with parts removed, showing the construction of half of the locomotive, it being understood that the other half is of similar construction;

Fig. 3 is a side View, with parts in section, of half of the locomotive of Figs. l and 2;

Figs. 4 and 5 are plan and side elevational views, respectively, with parts removed and other parts in section, of half of a modified form of locomotive, it being understood that the other half thereof is of similar or duplicate construction;

Fig. 6 is a plan view of one of the frame members of the locomotive of Fig.

Fig. 7 is a side elevational view of the frame member of Fig. 6;

, Fig. 8 is a perspective view, with parts broken away, showing a yoke type drawbar which interconnects the frame of one of the trucks of the locomotive of Figs. 4 and 5 with the frame of the intermediate section thereof; and

Fig. 9 is a perspective view'of the main frame of one of the trucks of the locomotive lof Figs. 4 and 5.

Referring to Figs. 1, 2 and 3 of the drawings,

partments Il, I2 and I3. Sections II and I3 are similar trucks and the construction of truck II will be described in detail hereinafter, it being understood that it applies equally to truck I3. Section I2 is an intermediate section which includes an intermediate frame I4 and provides a casing, enclosure or housing which supports and encloses control devices, rheostats, contactors and the like, for controlling the motors of the trucks II and I3. The intermediate section I2 isy symmetrically arranged and is connected at opposite ends to the trucks II and I3 by a similar structure, that by which it is connected to truck I I being described in detail hereinafter. Referring particularly to Figs. 2 and 3 of the drawings, it will be seen that the truck II lncluds a main frame I5 which provides an operators station at its front end adjacent which there is a controller I6 and a brake Wheel I'I, the front curved portion of the main frame I5 providing a bumper and carrying a car coupling I8. The main frame I5 is preferably formed of va heavy steel plate. Y

Each of the trucks II and I3 is lprovided with four motor driven traction wheels which are con-` nected in pairs to transversely extending axles, the pairs of wheels for the truck II being desig-A nated I9 and 20, respectively. Wheels I9 are rigidly attached to a shaft or axle 2| journaled in self-aligning bearings in spaced boxes 22 which are spring supported and mounted for up and down sliding movement in receiving openings 23.v in the parallel longitudinally extending side Walls of the main frame I5. Axle 2l and wheels I9 are driven from an electric motor 24, preferably through a single reduction drive in a manner rwell known in the locomotive art. The electric motor 24 is in part supported by journal bearings on the axle 2i and in part by spring supporting means 25 carried on a cross frame member 26, the ends of which are rigidly attached to and form a part of the main frame I5. Wheels 20 are similarly driven from a motorv 21 which drives them through an axle or shaft 28 through single speed reducing gearing, the motor 2l being supported on cross member 26 by spring means similar to spring means 25. Axle 28k is mounted in the main frame I5 in substantially the same manner that axle 2| is mounted therein. Current for operating the motors 2i and 21 is collected from an'overhead trolley 29 through a trolley pole 35, provided with a collecting shoe,

the other. line forthe electric circuit .extending 5.5`

through rails 3I of the track upon which the loco-.-

3 motive travels, in a manner which is well understood in the art.

As previously mentioned, the truck I3 is similar to the truck II. At its opposite ends the intermediate or control carrying section or frame i2 is connected to the trucks II and I3 by similar structure. That for connecting one end to the truck II wil-l now be described.

The frame I4 of intermediate section I2 carries an upstanding cylindrical post 32, the top and bottom of which are pivotally journaled to top and bottom lugs 33 and 35, respectively, of a drawbar 35. Thus there is a pivotal connectionto a. vertical or upright axis betweenone end of the drawbar 35 and the intermediate section 2 which holds the intermediate section )I2 'rigid against pivotal movement on any horizontal axis. The left-hand end of the drawbar 35, as viewed.v 'in Figs. 2 and 3, is provided with an upstanding ball connector 36 which is received in a split socket 31 formed insorattachedztothe cro-ss frame member 26,-thus providing a universal bal-l and socket connection between said end of the vdrawbar 35 and-the truck il or truck -rame I5, located between wheels i9 and 23.

The :ball and socket connection thus provided permits limited universal pivotal movement between the drawbar 35 and the main frame I5 of the truck II. Oi particular importance'in equally distributing the weight on wheels 19 and 23 i5 the fact that pivotal movement between the drawbar 35 and the main frame I5 is provided so that drawbar 35 may `swing in an upright plane or on a transverse horizontal axis substantially lmidway :between the opposite end pairs-oi wheels I9 and '23, as well 'as on :a longitudinally extending horizontal axis. The pulling and load transferring connection between the `frame :I5 Vand drawbar 35 is also on this axs as provided by said ball A'and socket connection.

itis furthermore to be noted that the drawbar 35 through its bal'l and socket vconnection with the frame I provides a direct support for one end ofthe interconnecting frame It oi the intermediate section I2. trucks lfI'l and I3 are pivotally connected through the frame M of the intermediate section 'I2 and the drawbar and its duplicate, the iormer being adjacent Aand `connected to the truck II, the 'latter adjacent'andA connected to the truck I3.

lEt is to be noted that the .main 'body oi the drawbar 35 extends below -the axis 'of axle 2.8 antiit 'passes under .an `integral fend 'member 38 oi the frame I5. At this point, the end member 38 is notched, as illustrated at 39, so that on opposite sides it 'forms abutments which provide a limited amount of clearance "between the -drawbar 35 and the abutting portions of -end member 33. This provides for a limited amount `oi pivotal movement 'of the drawbar 35 in ra horizontal plane, or, inl-other words, about the upright axis of the ball 36; this swinging or pivotal movement being limited by the dra-Wbar35 striking one side or the other .of the lnotch 39 in the end member 38.

V.In .addition to this pivotal .movement which will .aid the rather long articulated main frame ID in traveling around a sharp curve, additional pivotal movement is provided adjacent each end of "the 'intermediate section I2 by virtue of the pivotal connection between the bifurcated end of the vdrawbar 35, represented particularly by the lugs 33 and 34, and the upstanding or vertical shaft or post 32. It is to benoted that this upright pivotal axis is entirely outside the longitudinal Ydimensions Aor boundaries .of 'truck II In Aother words, the two which places it longitudinally outwardly of an upright transverse plane adjacent the outer peripheries of adjacent truck wheels 2D. This swinging movement between the drawbar 35 and the intermediate section I2, or between the truck II and the intermediate section I2, is quite appreciable and is limited by the clearance between the curved or rounded .end of the intermediate section I2 Yand the opposite curved bumper-like portions of the main frame I5 which are clearly .illustrated in Fig. 2 of the drawings.

The universal joint 36, 3'I provides for relative rotation-between the truck II and the intermediatefsection I2 `or,more speciiically, between the truck "1I andthe drawbar 35 on a longitudinally extending horizontal axis, thus preventing development of stresses and strains in the intermediate section `I2. However, it is necessary to give :stability to the intermediate section I2 since it is supported entirely trom the trucks I I and I3 and yet provides for .their y.relative movement as well as relative movement between each of .them and the intermediate section on said longitudinally extending horizontal axis. This `stability between intermediate section I-Z and the truck II is realized by virtue of a pair of oppositely and transversely rextending wings di) carried by the drawbar 35 and provided with cups which recelve spaced coil springs el, the upper ends of which abut spaced projections or lugs i2 on -o-pposite .sides of the center lineoi the main .frame I5 and lformed integral therewith. It isalso evident that the spaced springs 4I lare on opposite sides of a vertical plane passing through the bal-l 36 and post 32.

It isobviousthat any rotational movement of the 'intermediate section I2 on a longitudinally extending horizontal axis will be transferred to the drawbar 35 yand :th-rough the :springs si to the yframe I5 of the truck II, such springs 4I permitting limited amount oi relative movement between said intermediate sec-tion i2 and truck I I about said longitudinally extending horizontal axis whichis resisted by said springs. The Opposite end of the intermediate section li2 is vconnected to the truck i3 by mechanism, which 'is a duplicate of that above described, for connecting the one endv to the truck I i.

From the above description it is obvious that each 'of thesections `I I, Ai2 and I3 is free topivot through .a `limited .degree with respect to the other twoof said sections about transverse and longitudinal horizontal axes. Furthermore, swinging movementris provided .between the intermediate section I2 and each truck 'I :and `I3 vabout two spaced upright axes, one along the 'axis `of ball 36, the other along the axis of post 32. This makes four spaced-apart upright axes about which the truck I I can pivot with respect tothe truck I3, thus insuring ability of the `complete locomotive to turn on a sharp curve.

Furthermore, the intermediate section 'I2 is supported entirely from the two trucks yI I and I3 by virtue of the -fact that opposite ends 'thereof are supported from trucks II and I3, respectively. The connection provided allows for the articulation above mentioned, but provides a structure which is essentially rigid in :a vhorizontal plane, insofar as the intermediate section I'2 and thetwo connecting drawbars are concerned.

'Therefore,"there are only-two po-intsof pivotal movement on horizontal V'transverse axes between the trucks II and I3, `one being along the horizontai axis of 'the ball 33, the other 'along the horizontal :axis of :a similar bali connected to truck I3. Stated another way, there isa single' point of pivotal connection on a horizontal transverse axis between each end of the intermediate section I2 and its supporting truck I I or I3. Also, there is a single longitudinally extending horizontal axis about which the intermediate section I2 can pivot with respect to each of the trucks II and I3, this being a longitudinally extending axis passing through the centers of ball 36 and its duplicate.

In the operation of this device, as the locomotive travels over mine rails, for example, while drawing the cars of a coal train, it is obvious that articulation about upright axes is permitted between the various sections II, I2 and I3 so that it can go around sharp curves. Furthermore, the trucks II and I3 are freeto pivot relative to each other on two spaced-apart transverse horizontal axes and on a longitudinally extending horizontal axis, thus providing all the necessary or desired freedom of relative movement of the trucks II and I3 which may be required by unevenness in the rails 3|. The intermediate section I2 which supports motor controls, relays, resistors, etc., is pivotally connected to both of the trucks II and-I3 and is supported thereby andfurthermore provides a main connecting frame between them. A powerful locomotive may be produced by virtue of the fact that eight driving wheels are provided which are driven by four driving motors and this it does without sacrice of the flexibility of the locomotive which would be inherent if eight drivingv wheels were attempted to be attached to a single rigid main frame.

In Figs. 4 to 9, inclusive, I have shown a modifled form of locomotive, it being understood, however, that this form, like that of Figs. 1, 2 and 3, involves a pair of similar trucks and an intermediate section, thereby providing a single locomotive with four driving motors and eight driving wheels.

The locomotive of Figs. 4 to 9, inclusive, includes three interconnecting sections generally similar to sections II, I2 and I3 of the locomotive of Figs. 1 to 3, and which include a pair of similar end trucks, one of which is seen at 43, and an intermediate section which is similarly constructed on opposite ends and substantially half of which is illustrated and seen at 44. The intermediate section 44 is generally similar in arrangement and function to the intermediate section I2, though it differs in structural details and in the detailed method of attachment to the two trucks at opposite ends, as hereinafter pointed out.

The truck 43 includes a main or truck frame 45, important parts of which are shown separately in Fig. 9 of the drawings. Said frame 45 includes a U-shaped frame member 45 which provides a front bumper and support for the operator and a controller 41 and brake wheel 48, as best illustrated in Figs. 4 and 5of the drawings. The parallel upstanding spaced-apart side plates of the frame 46 carry a rearwardly extending yoke 49 forming a rearwardly extending cantilever portion of the main frame 45, the function of which is pointed out hereinafter.

The truck 43 includes longitudinally spaced axles I) and 5I which are provided with rigidly attached motor driven traction Wheels 52 and 53, respectively, which axles 5I! and 5I and wheels 52 and 53 are driven by electric motors 54 and 55, respectively, preferably through .single reduction gearing. The motors 54 and 55are journaled to the axles 5D and 5I, respectively, and are supu ported on a pivot cross shaft 56.

Opposite ends of the axles 50 and 5I are journaled in self -aligning bearings which are mounted in a pair of laterally spaced longitudinally extending upright sub-frame or walking beam members 51; the axes of the axles 50 and 5I being held against all movement relative tothe sub-frame members 51 except limited pivotal movement provided by the self-aligning bearings, while the axles 50 and 5I are, of course, free to rotate relatively thereto. The sub-frame members 51 are provided at opposite ends with similar bearing shoes 58 which bear against the inner walls of the upright side plates of the frame member and the inner walls of parallel upright side plates of a yoke-type drawbar 59 which is illustrated in Fig. 8 of the drawings and which is described more completely hereinafter.

The left-hand shoes 58, as viewed in Figs. 4 and 5 of the drawings, obviously co-operate with the frame member 46 to maintain the sub-frame members 51 against lateral movement and thus hold axle 50 in proper position laterally with re-- spect to the main frame 45. The right-hand shoes 58 similarly cooperate with the yoke 59 .to position the axle 5 I.

At their centers, the sub-frame members 51 have square openings 50 which receive bearing blocks 6I for free yup and down sliding movement, but which hold said bearing blocks 5I against movement in a horizontal plane.

The shaft is provided with an enlarged boss 52 on each end which extends into a bearing block BI and is pivotally mounted relative thereto. As a consequence, the shaft 56 is free to move up and down a limited amount with respect to each of the sub-frame members 51, but is held against longitudinal movement or movement in a horizontal plane relative thereto.

The bosses S2 of shaft 55 both extend through circular openings 53 in the yoke 49 of truck frame 45 and are keyed thereto by keys, one of which is seen at 54 in Fig. 4 of the drawings.y The outer end of each of the bosses 52 is received in a bushed opening (see Fig. 8) oi the drawbar or yoke 59. Yoke or drawbar 59 is thus pivoted to the main frame 45 at spaced points for pivotal movement about a transversely extending horizontal axis which is also the axis of the shaft 56 and thus the axis about which the truck sub-frame 51 is pivotally mounted with respect to the main frame 45.

From the above description it is evident that the two axles 59 and 5I with their associated wheels 52 and 53 and motors 54 and 55 are mounted in the sub-frame 51 and with it can pivot about the axis of the shaft 56 with respect to the main frame 45 and also move upwardly and downwardly with respect theretov in a transverse upright plane passing through the axis of said shaft 56. Otherwise, the sub-frame 51 is held to move with the main frame 45. Each frame 51 can also pivot on shaft 55 independently of the other as provided by the self-aligning bearings for axles 5B and 5I.

To provide for spring suspension of the main frame 45 with respect to the sub-frame 51, providing for limited tilting movement of the main frame about the axis of the shaft 56 as 'well as limited up and down movement thereof with respect to the sub-frame 51, there are four coil springs 66 interposed between the subetrame members 51 and the main frame 45. There is one coil spring 66 adjacent each end of each of the sub-frame members 5'! which is received and held by a boss 61 thereof (see Fig. 7)

jreceiving bosses.

'The ppr'ends of the two left-hand springs B6', 'as Aviewed in Figs.l e and 5., .are received by downwardly *extending bosses carried 4by a cross r''ember 68 of the main frame .45. The righthand springs Elias viewed in Figs. l and '5 oi the drawings, are received by similar downwardly extending bosses on the two right-hand projectionsof the yoke 9, 'as clearly illustrated in said Figs. 4 and 5.

'The yoke-type dr'awbar '5s includes a pair of parallel spaced-apart upstanding plates or arms v59 wliich includes pivotal ears lil .which are provided with the previously mentioned openings 65 'and provide the pivotal pulling and "load supportigaconnection between the drawoar 59 and the mainframe se on the transversely Vextending horizontal 'axis which is located substantially mid- J'way between the two pairoi wheels 52 and 53, respectively, thus providing equal loading of said -vwhe'els-SZ and 53.

interconnecting the side plates 69 are top Vand .bottom cross end plates 'il and i2 which are :rigidly attached thereto. lA lcasting 'i3 is prov-ided with top and bottom trunnion `connections 14 and 'l5 with the end plates ll `and 'l2 of the drawbarlie 'and if desired may be considered as :Ta-portion thereof. The trunnion connections le z=and`15 provide a pivotal connection between the feasting 13 and drawbar 59 on a vertical .or upiright axis. It is vto he noted 'that this axis islo- Hcated longitudinally outside the boundaries oi tti-"nok vwheels 52 and B3 and is thus outwardly o'i n upright transverse plane adjacent the .outer eripheries of adjacent truck wheels 53, thus jpro'viding adequate articulation of a Alongrloco" tnotive so it'can negotiate relatively lsharp curves. Casting 13 'is provided with ahorisontal longituldinally extending bore which ispreie .bly 1.3u-shed :.to receive a tubular frame member 'l which con- 's-ti'tutes the backbone'or principal firame member bar pull between the truck e3 and the intermediate A 's`eotion.`l., and thus between the truck at one tend-fand a vsimilar truck at the other end by way oi intermediate section is transferred Etldrough 'the 'tubular frarnemember lli, the castf-iigfflfandits equivalent,l and the yokeY 59 of truck iand the equivalent yoke on the .opposite end fof the locomotive.

A SSince the tubular frame 'member'l is' free to frctate in the casting 'i3 and since the center of i'g'ravity of the casing or housing?? is alcove the laxisfof the tube l5, supports provided vtonelli-the housing "ll againstunlimited rotation about the axis of the shaitiit. 'is provided ibysimilar mechanism in ea'chlend oi the housing TI'intheOrmof a forwardly extendingplate 9G 'lfwhi'chis constructed to providea pair oi laterally spacled arms having spaced downwardly extending bosses whichrecei'vesprings el which rest on and yare supported by laterally extending wings Y82 'f'formed on the casting 3 and provided with spring The two springs ABl are oo- ;viously on opposite sides of the axis ci the tube "1B-and consequentlythey will 'tendto hold the housing l'agaist 'rotation onfits shalt while permittins a'limited .amount of pivotal reveieet between the truck 43 and with .it the @raviver i9 and the intermediate section .44 and ultimately the other supporting truck. In other words, since both the trucks are mountedfor a limited amount of movement on a longitudinally .extending hori zontal axis with respect to the intermediate sec-f tion fili, they are so mounted with lrespect vto each other. f

The connections above described between the truck 43 and the intermediate section `'It Care duplicated between thel complementary truck and the opposite end of the intermediate section 45, It is to be noted that in general the flexibility oi' the locomotive of Figs. 4 to 9, inclusive, -is lar to that of the locomotive of Figs. Y1, 2 and 3, and substantially all of the'general descriptignpf the latter will apply to it. y,Certain differences. however, are obvious.

For example, the yoke-type Ldrawbar 5 8 is pivf oted to the frame 45 of the truckonly on atransfversely extending horizontal saxis. lhe .,drawbar el) is rigid against any pivotal movement with respect to the intermediate section 44 on any transverse horizontal axis, but, unlike the flocomotive of Figs. 1, 2 and there is -a pivotal oon,- nection between the frame of the intermediate section le and the drawliar. That is, Afreine 1.6 is pvotally connected -to drawbar 59 .abolita horizontal longitudinally `extending axis, hile in the locomotive vof Figs. v1,32 and g3, intermediate section l2 is rigid-withrespect to thefdrawbar :3,5 about the longitudinally extending :horiz n tal axis.

Also in the locomotive of Figs. '4to ;9 lthere are only two, as distinguished from four, axes :of vertical connection between vthe V`three sections. That is, intermediate section 44 lis connected at one end to one of the ytrucks about la single pp,- right axis which is the upright axis `ofthe Casting 13. A similar pivotal connection is provided between the opposite end of the intermediatesection lill and the other truck which .is -complementary to truck 43.

Obviously those skilled in the artmay malte various changes in the detai1,S"-and Yarr-angement or parts without departing from .the `spirit and scope of the invention -as deiinedrby the claims hereto appended, and I therefore "wish `-not to be restricted to the precise construction herein disclosed.

l-Iaving thus d escribed'and shown an .embodle ment of my invention, what I desire tosecurebv Letters Patent of the United States .isz

l. A locomotive including a-.pair of longitudt Vnally spaced `end frames., two -pairs .of A.I notor driven `traction and supporting wheels for Aeach end frame, anintermediate frame supported by said end frames,-means.providing apivotal connectionbetween each end of said Vintermediate frame audits supporting end irame, eachfsaid means including drawbar mechanismpivotally connected at one end thereof --to saidfintermediate Vframe about arvertical axis which-isspaced from driven traction and supporting nwheels-for each end frame, an intermediate vframef.;supported'.liy

said lend frames, means providing a pivotal connection between each end of said intermediate frame and its supporting end frame, each said means including drawbar mechanism pivotally connected at one end thereof to said intermediate frame about a vertical axis which is spaced from the supporting end frame and which is rigid against pivotal movement en a transverse horizontal axis, and means providing a universal connection between the other end of said drawbar mechanism and said end frame at a position between said pairs of wheels.

3. A locomotive including a pair of end frames, two pairs of motor driven traction wheels for each end frame, an intermediate locomotive control lmeans supporting frame, means interconnecting each end of said intermediate frame to one of said end frames and supporting it therefrom, said means including a drawbar for each end of said intermediate frame, means pivotally connecting one end of each drawbar to said intermediate frame for pivotal movement about an upright axis, means providing a universal connection between the other end of each drawbar and one of said end frames intermediate its traction wheels, abutment means providing for limited horizontal swinging between each drawbar and associated end frame, and spring means between each drawbar and the adjacent end vframe resiliently holding it against rotation on a longitudinal horizontal axis.

r 4. A locomotive including a pair of end frames, two pairs of motor driven traction wheels for each end frame, an intermediate locomotive control means supporting frame, means interconnecting each end of said intermediate frame to one of said end frames and supporting it therefrom, said means including a drawbar for each end of said intermediate frame, means pivotally Aconnecting one end of each drawbar to said intermediate frame for pivotal movement about an upright axis, means providing a universal connection between the other end of each drawbar and one of said end frames intermediate its traction wheels, and spring means between each drawbar and the adjacent end frame resiliently l holding it against rotation on a longitudinal horizontal axis.

5. A locomotive including a pair of end frames, two pairs of motor driven traction wheels for each end frame, an intermediate locomotive controlmeans supporting frame, means interconnecting each end of said intermediate frame to one of said end frames and supporting it therefrom, said means including a drawbar for each end of said intermediate frame, means pivotally connecting one end of each drawbar to said intermediate frame for pivotal movement about an upright axis,`means providing a pivotal connectionfbetween the other end of each drawbar and one of said end frames intermediate its traction wheels whereby said drawbar may swing in an .upright plane, andabutment means providing for limited horizontal swinging between each drawbar and associated end frame.

6. A locomotive including a pair of end frames, two pairs of motor driven traction wheels for each end frame. an intermediate locomotive control means supporting frame, means interconnecting each end of said intermediate frame to one of said end frames and supporting it therefrom, said means including a drawbar for each end of said intermediate frame, means pivotally connecting one end of each drawbar to said intermediate frame, for pivotal movement about an upright axis located outside the boundariesof said traction wheels, and means providing a load supporting and pulling pivotal connection on a horizontal axis between the other end of each drawbar and one ofsaid end frames substantially midway between its pairs of traction wheels.

'7. A locomotive including a pair of end frames, two pairs of motor driven traction wheels for each end frame, an intermediate locomotive control means supporting frame, means interconnecting each end of said intermediate frame to one of said end frames and supporting it therefrom, said means including a drawbar for each end of said intermediate frame, means pivotally connecting one end or" each drawbar to said intermediate frame for pivotal movement about an upright axis, and means providing a pivotal connection betweenthe other end of each drawbar and one of said end frames intermediate its traction wheels whereby said drawbar may swing in an upright plane, each drawbar extending in part below the axis of rotation of one pair of traction wheels of the associated end frame.

8. A locomotive including a pair of end frames, two pairs of motor driven traction wheels for each end frame, an intermediate frame, means connecting each end of said intermediate frame to one of said end frames and supporting it therefrom on a horizontal axis between said two pairs of traction wheels, each said means including a yoke type drawbar pivoted to an end frame on a horizontal axis intermediate pairs of said traction wheels and-.extending laterally of a pair of said traction wheels, and means pivotally connecting said drawbar to. said intermediate frame on an uprightaxis. Y

9. A locomotive including a pair of end frames, two pairs of motor driven traction wheels for each end fra-me, an intermediate frame, means connecting each end of said intermediate frame to one of said end frames and supporting it therefrom at a positionsubstantially midway between said two pairs of traction wheels, each said means including a yoke type drawbar pivoted to an end frame on a horizontal axis substantially midway between said two pairs of traction wheels and extending laterally of a pair of said traction wheels, and means pivotally connecting said drawbar to said intermediate frame on an upright axis.

10. A locomotive including a pair of end frames, two pairs of motor driven traction wheels for each end frame, an intermediate frame, means connecting each end of said intermediate frame to one of said end frames and supporting it therefrom, each said means including a yoke type drawbar having a pair of arms pivoted to an end frame on a horizontal axis intermediate pairs Aof said traction wheels, said arms extending laterally outside of a pair of said traction wheels, and means pivotally connecting said drawbar to said intermediate frame on both an upright axis and a horizontal longitudinally extending axis.

11. A locomotive including a pair of end frames, two pairs of motor driven traction wheels for each end frame, an intermediate frame, means connecting each end of said intermediate frame to one of said end frames and supporting it therefrom, each said means including a yoke type drawbar having a pair of arms pivoted to an end frame on a horizontal axis and extending laterally outwardly of a pair of said traction wheels, and means pivotally connecting said drawbar to said intermediate frame on an upright axis.

12. A locomotive inoluding a pair of end frames,

two pairs of motor driven traction wheels for each end frame, an intermediate frame, means connectng each end of said intermediate frame to oneof said end frames and supporting it therefrom Substantially midway between pairs of said traction wheels, each said means including a yoke type drawbar pivcted to an end frame on a horizontal axis substantially midway between pairs oi said traction wheels,l and extending laterally of a pair of said traction wheels, means pivotally oon'necting said drawbar to said intermediate frame on both an upright axis and a horizontal von'gitudinally, extending axis, a control supporting body' on said intermediate frame, and spring means resiliently'holding said intermediate frame againstV rotation on a horizontal longitudinally extending axis relative to said yoke. 13. A locomotive including' a pair of end frames, two pairs of motor driven traction wheels for each'end frame, an intermediate frame, means connecting each end of said intermediate frame to one of said end frames and supporting it therefrom substantially midway between pairs of traction wheels, each said means including a yoke type drawbar pivot-ed to an end frame on a horizontal axis substantially midway between pairs of said traction wheels and extending laterally of a pair of said traction wheels, means pivotaliy connecting said drawbar to said intermediate frame on both an upright axis and a horizontal longitudinally extending axis, and spring means resiliently holding said intermediate frame against rotation on a horizontal longitudinally extending axis relative to said yole.

14. A locomotive including a'pair of longitudinally spaced trucks, an intermediate control supporting frame, each of said trucks including two pairs of motor driven traction wheels, each pair being on a transverse axle, a iframe receivingr each axle, another frame,v means pivotally mounting said rst frame to said second frame for pivotal movement on a transverse horizontal axis intermediate said axles and for up and down movement of said axis, springs on opposite sides of said axis interposed between said two frames whereby the second frame is pivotally connected 'w and resilienily Supported, by the rst frame, and means including a yoke type drawbar interconnecting each truck with. @me end. of seid intermediate frame, Said. yoke. @eine eivetally oonnected to the truck on the aforementioned transverse horizontal axis Said. drawbei also including a member providing connection with sra-id intermediate frame on an upright axis and on a hori- Y' zontal longitudinally extending axis.

A IOCOmO-Ve nilqng. .af Pei? 0f 199mm@- nly spaced tl'uck. in itfiidee Contol SUP.- port'ing frame, eacli of said trucks including two pairs of motor driven traction wheels, each pair being on a transverse axle, a frame receiving each axle, another frame, means pivotally mounting said nrst frame to said; second frame for pivotal movement on a transverse horizontal axis intermediate said axles and for up and down movement of said axis, spring means on opposite sides of said axis interposed between said two frames whereby the second frame is pivotally connected to and resiliently supported by the first frame, and means including a yoke type drawbar interconnecting each truck with oneend of said intermediate frame, said yoke being pivotally connected to the truck on a transverse horizontal axis, said drawbar also including a member pro viding connection with said intermediate frame on an upright axis and on a `horizontal longitudinally extending axis.

15. A locomotivev including a pair of end trucks each having at least four driving wheels, an intermediate frame member connecting said trucks, and drawbar means connecting each end trucl; to an adjacent end of said intermediate member including means providing pivotal movement about a transverse horizontal axis located substantially midway between the wheels ofeach truck and about an upright axis located outside the boundaries of said truck wheels.-

17. A locomotive including a pair o'f longitudinally spaced trucks, an intermediate control supporting frame, each of said trucks including two pairs of motor driven traction wheels, each pair being'on a transverse axle, a frame receiving each axle, another Vframe, means Divot-A @uy mounting Said, m51? frame t0 Sad SjeGQ'd frame for pivotal movement 'on a transverse horizontal axis intermediate said axles and for up and down movement of said axis, spring means on opposite sides ofsaid axis interposed between saidtwo frames whereby the second'frame is pivotally connected to and resi-liently supported Iby the rst frame, and means including'a yolie type drawbar interconnecting each truck with one end of said intermediate' frame, said yoke being pivotally connected to the truck on a transverse horizontal axisQsaid drawbar also including a member providing connection with said intermediate frame on an upright axis.

ARTHUR L.

REFERENCES CITED The following references are oi record .in the ille of this patent:

UNITED STATES PATENTS Number Name Date '155,460 Dalton et a1 i Mar. 2,2, 1904 909,430 Levin Jari. 12,` 1909 912,303 Garrett Feb. 16', 1,909 1,195,723 Pratt J Aug. 722,' 1916 1,389,076 Sloane Y I T Aug'. 30, 1921 FOREGN BeTE-MNTS Number Country Date 218,246 Great Britain v Mar. 5, 1925 323,723 Great Britain Jan. 6, 1930 508,005 Ger-many Sept. 24, 19.30 

